AT&T’s Enhanced PTT is based on technology from Kodiak Networks. AT&T says it has sub-second call setup; larger contact lists and talk groups than rival PTT solutions; can combine PTT services and mobile applications; supervisory override; and talk group scanning.

Sprint is actively working to recapture iDEN customers onto its CDMA network, notes Fierce Wireless. Sprint has around 3 million customers on its iDEN network. The carrier hopes to move its iDEN customers to CDMA and LTE PTT service, then decommission iDEN next year. Sprint said in September that 1 million subscribers are now on Sprint’s CDMA PTT service.

Sprint’s Push-to-talk coverage footprint is planned to increase to nearly 2.7 million square miles and is expected to cover a population of 309 million – an increase from the iDEN network’s 908,370 square miles covering a population 278 million.

In the third quarter Sprint says it was able to recapture 59 percent of leaving postpaid Nextel customers and move them to its CDMA network, just below the recapture rate of 60 percent in the second quarter.

Sprint Nextel will add capacity to its LTE network from its 1.9 GHz (PCS) band that the carrier uses for most of its voice and data traffic. Sprint plans to move voice traffic to the 800 MHz band and data traffic from CDMA to LTE. Sprint Nextel has between 20 megahertz and 30 megahertz of spectrum in the 1.9 GHz band outside of its current G-Block (2 x 5MHz) LTE spectrum.